The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 11, 2009
Filed:
May. 02, 2007
Ken Yamamoto, Shizuoka, JP;
Eiji Maeno, Shizuoka, JP;
Ken Yamamoto, Shizuoka, JP;
Eiji Maeno, Shizuoka, JP;
NTN Corporation, Osaka, JP;
Abstract
This invention provides a chain tensioner that is compact, excellent in operation, easy to maintain and handle and low in manufacturing cost. This chain tensioner has a tubular housinghaving a bottom, a plungerinstalled in the inner peripheryof the housing so as to smoothly slide inside the housing, a return springproviding the plungerwith a force pushing outward, a plurality of latching grooves-formed on the outer periphery of the plunger, a resister ringcapable of locking in the latching grooves, and a check valvethat is mounted on the bottom of the housing inner periphery, provides the housing inner peripherywith operating oil and prevents its reverse flow. The range of backward movement of the plungeris limited by mating the resister ringlocked in the latching grooves-with a first stopperformed on the housing inner periphery